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Claude Sonnet 5API
Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work.
Prices update automatically — checked daily against provider list prices.
- $4 per 1M tokens, assuming 3 input for 1 output the convention used by Artificial Analysis
- cheaper than 31% of the 192 commercial models tracked here
- 7 of 28 Anthropic models tracked here, from cheapest
Benchmarks & performance
Independent benchmark scores for Claude Sonnet 5, measured by Artificial Analysis. Higher is better. Measurement mode: Adaptive Reasoning, Max Effort.
Models at this level cost $5 per 1M tokens (median of 15) — this one costs $4.
Cheaper and better on this index: Grok 4.6 · GPT-5.6 Sol (batch) · GLM 5.3 and 8 more
About this model
Claude Sonnet 5 is a commercial AI model by Anthropic. The specifications below are tracked automatically: pricing is refreshed daily from public list prices, so the numbers on this page reflect the current cost of using the model through its API.
Frequently asked questions
What is Claude Sonnet 5?
Claude Sonnet 5 is an AI language model from Anthropic. It is a proprietary model, available through an API. It scores 55.3 on the Artificial Analysis intelligence index.
Is Claude Sonnet 5 free?
Claude Sonnet 5 is not free: it costs $2 per million input tokens and $10 per million output tokens. Open-weight alternatives can be self-hosted at no per-token cost.
What is Claude Sonnet 5 good at?
Independent benchmarks from Artificial Analysis give it GPQA 91.1%, Humanity's Last Exam 41.3%, Long Context Reasoning 77%, SciCode 53.6%, τ-Bench Banking 37.3%, Terminal-Bench 80.5%. It is particularly used for code generation.
How fast is Claude Sonnet 5?
It generates about 90.3 tokens per second, with a median 104.93s delay before the first token. Measured independently by Artificial Analysis.